12266661 has 16 divisors (see below), whose sum is σ = 17902080. Its totient is φ = 7409520.

The previous prime is 12266641. The next prime is 12266663. The reversal of 12266661 is 16666221.

It is not a de Polignac number, because 12266661 - 2⁵ = 12266629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12266663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16230 + ... + 16968.

It is an arithmetic number, because the mean of its divisors is an integer number (1118880).

Almost surely, 2^12266661 is an apocalyptic number.

12266661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12266661 is a deficient number, since it is larger than the sum of its proper divisors (5635419).

12266661 is a wasteful number, since it uses less digits than its factorization.

12266661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its digits is 5184, while the sum is 30.

The square root of 12266661 is about 3502.3793341099. The cubic root of 12266661 is about 230.6262767535.

It can be divided in two parts, 1226 and 6661, that added together give a palindrome (7887).

The spelling of 12266661 in words is "twelve million, two hundred sixty-six thousand, six hundred sixty-one".